Reaction of alkyladamantane compounds to form products having two linked adamantane nuclei
US4008251A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1970 |
| Grant date | Feb 15, 1977 |
| Priority date | — |
| Expiry date | Jul 20, 1990 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/44
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Alkyladamantanes and/or alkyladamantanols of the C.sub.12 -C.sub.19 range containing 1-3 alkyl groups of the C.sub.1 -C.sub.3 range are converted to hydrocarbon dimers in which two adamantane nuclei are linked to each other through an alkylene radical derived from and having the same number of carbon atoms as an alkyl group of the starting material. The reaction is effected by contacting the starting material with sulfuric acid having a strength in the range of 94-102% H.sub.2 SO.sub.4 in the absence of any other reactant material. When the reactant is a dimethyladamantane or ethyldimethyladamantane or a monool corresponding thereto, ether products in which two adamantane nuclei are joined both through an ether linkage and through a methylene or ethylene radical can also be produced. Some of the linked products are oily liquids while others are normally solid. Usually a small amount of alkyladamantanone is formed. Both the hydrocarbon dimers and ethers have unusually high traction coefficients and are particularly useful as component of traction fluids. These products also have various other uses, such as in coating, investment casting, caulking and potting compositions and as stif…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.